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Letter

On the Nonequilibrium Thermodynamics of Large Departures from Butler−Volmer Behavior

Rodrigo de Miguel*

Institute for Electronics and Telecommunications, Norwegian University of Science and Technology, 7491 Trondheim, Norway

J. Phys. Chem. B, 2006, 110 (16), pp 8176–8178

DOI: 10.1021/jp060506p

Publication Date (Web): March 18, 2006

E-mail: demiguel@iet.ntnu.no.

Abstract

Large deviations from the behavior predicted by the Butler−Volmer equation of electrochemistry are accounted for using mesoscopic nonequilibrium thermodynamics. The nonequilibrium thermodynamic hypotheses are extended to include velocity space and cope with imperfect reactant transport leading to departures from Butler−Volmer behavior. This results in a modified Butler−Volmer equation in good agreement with experimental data. The distinct advantages of the method and its applicability to analyze other systems are briefly discussed.

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